Disk wheel for motor-cars



1. M. E. FRANC. DISK WHEEL FOR MOTOR C ARS. PPLICATION FlLEU4 FEB. 15,1918.

Patented July, w20.

niet: Wn'nni; non Morciacans.

Specication of Letters Patent.

Application filed .February 15, 1918. Serial No. 217,417.

lle it known that I, JosnrH MARIE -ll'rinninc Fanno, a citizen oi.l theFrench Republic, residing atSt. Vallier, Drome, in France, have inventedcertain new and useful improvements in Disk liVheels for hlotor-Cars, ofwhich the following is a specification.

This invention relates to improvements in disk wheels llor motor cars.

The impii'oved wheel made of metal and has a divided rim. Yand isessentially characterized by its rapid method ot mounting anddisniounting'lry the simple aliixingor removal of a steel disk or platemaintained locked by a safety nut against a part of the rim designed toreceive it.

The characteristic feature olf the invention consists in. the shape ofthe telly carried by the fixed disk and comprising on one side anincurvod Ytold oi' metal for inclosing one of the beads ot the pneumatictire andy extending in a concave form under ,tbe base ot the tire andterminating in a thickened part against which the removable disk abuts,the latter having an incurved edge to receive the other bead of thetire. The result is that in the wheel forming the subject of theinvention there is no litting of one ielly in the other, nor any helvingol head, nor any bolt, nut, grub screw or the like at the periphery ofthe disks; in a word, no member capable of presenting an obstacle,byjits oxidation or any other cause, to the removal of the movable disk.

.l'iyl the shape given to the fixed disk which by curving inwardccncavely under the base ,of the tire, supports the whole 'Weight *ofthe carriage, the movable disk only intervencs to maintain the outerlbead ot the pneumatic tire in place. This shape prevents the telly fromoverhanging, and at the same time reduces the width of the wheel.

The surface of the adhesion of the movable disk against the thickenededge being considerable, and the greater part of the base and beads ofthe pneumatic tire being in immediate Contact with the tell y integralwith the fixed disk (the movable disk only embraces a small part of thebead), it fol- Alows that there can be no sliding ofthe movable dis-k,and vthat all the contrivances against such sliding are omitted 1n thewheel which nForms 'the 'sulnect oi' the invention.

The, invention' further comprises a lock.

F ig. 1s a section o n an enlarged scale of the rim ot the wheel.

The wheel is essentially composed ot a rim portion a riveted to aconcave flange b2 of a circular (lished disk Z) lhx'ed to the hub dcarrying the brake drum, either by rivets or by direct casting. l

Symmetrically externally with this disk is a second and removable disk cforming resented .nay n, ieee.

the other tace of the wheel and having centrally a circular opening toallow of passing it on to the hub (Z on which it tits.

The periphery of this second disk is incurved to form the removable rimportionV 02 as shown in Fig. 3 and is inwardly bent adjacent said rimportion to form a circular projection c1 adapted to iit in and againstan annular grooved thickened shoulder 711 of the tlrst rim portion b.

The aiiixing of the second disk forms the complete wheel and rim, thelatter inclosing the beads of the pneumatic tire. A safety nut j pressesthe second diskagainst the lirst and secures the whole, '.lhe rim in twoparts'thus forms a whole having the appearance and advantages of anordinary rim inclosingthe beads of the pneumatic tire in the usualmanner.

In order to support the running pressure ot' the wheel the disk l) isbent to form a flange b2 extending under its rim port-ion (t which isfixed thereto. Also to reduce the pressure oit the beads of the tire onthe tire retaining portion oit the movable disk the bottom ot the rim isslightly concave.

'The disks being solid a covered opening g is provided in the removabledisk for affording access to the tire valve.

To assure the fixity of the device the locking nut f is provided with abronze flange j extending beyond the hexagonal nut head, This iiange isprovided with a number of holes Z which correspond with anequal numberof holes formed in the removable disk. :l spring plate i is arrangedturnable on a pin and carrying at its end a button ot suiiicient lengthto pass through the flange and engage into one of the holes in thedisliand thus assures locking of the ico similar' spring platecan bearranged opposite the first. y

What 4I claim as .my invention and desire to secure by Letters Patent ofthe United States is A disk Wheel comprising a hub, a dished circulardisk having'an inwardly turned concave 'flange fixed centrally on oneend ofsaid hub7 a circular rim vportionhaving a concave base fixedaround said flange and having its one edge curved inwardly and its otheredge thickened to forni anannn'lar grooved sea t1ng,`a removable dlshedcircular disk provided With a central orifice adapted to fit on saidhuband having its periphery inwardly4 curved and being inwardly bentadjacent said inwardly curved periphery so as to form a circular inwardprojection adapted to coincide with and lie 20 and a central nut,

in saidl grooved seating, for fixing said removable disk upon said hub.

In Witness whereof I have signed this specification in the presence oftwo wit- 25 nesses.

JOSEPH MARIE ETIENNE FRANC. IVitnesses:

JEAN GrnmrAIN,l 'Lf EsoHER.

